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San Gabriel Mountains National Monument

Mount Wilson Observatory 100-Inch Telescope

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Mount Wilson Observatory 100-Inch Telescope

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    Location: San Gabriel Mountains National Monument, Los Angeles County, California, United States

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    July 31, 2023

    Hiking

    This telescope was built in 1917 and took over 11 years due difficulty hauling all the components up Mt. Wilson Toll Road. The glass mirror weighs around 9,000 pounds and remains the largest solid glass mirror ever made. This was the largest telescope until the 200" telescope was built on Palomar Mountain.

    mtwilson.edu/building-the-100-inch-telescope

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    Best routes to Mount Wilson Observatory 100-Inch Telescope

    4.5

    (2)

    15

    hikers

    1. Mount Wilson via Sturtevant Trail loop — Angeles National Forest

    19.3km

    07:12

    1,270m

    1,270m

    Hard hike. Very good fitness required. Mostly accessible paths. Sure-footedness required.

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    Elevation 1,720 m

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    Location: San Gabriel Mountains National Monument, Los Angeles County, California, United States

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